Fishpond with sewage supply



Sept 20 1927' K. IMHOFF FISH POND WITH SEWAGE SUPPLY Filed Aug. 25, 1924 WWI-933565:

Patented Sept. 20, 1927.-

PATENT OFFICE.

KARL IIHOIF, OF ESSEN, GERIANY.

IIBHPOND WITH SEWAGE SUPPLY.

Application filed August 25;

If crude domestic sewage is led into a fish pond, the clean water in the latter is dislaced by the sewage at its inflow. Therey, a putrefaction place is formed in the vfish pond, which extends farther and farther over the latter and acts detrimentally on the life of the fishes.

Fish ponds can therefore be used only for the treatment of sewa e if the latter is (1) freed from slu go in settling basins,

and

(2) diluted at least with a triple quantity of pure water, for instance spring water or river water, for the purpose of becoming 1 stable b said dilution before its admission to the sh 0nd.

As it is, owever, mostl very difficult to get the required pure di ution water, the

present invention has for its object to make said dilution unnecessary by convenient arrangements of the fish pond itself.

The accompanying drawing illustrates 'said improved arrangement dia rammatically:

. Fig. 1 is a plan view of a sh pond fitted with the same, while Figs. 2 and 3 are a perpendicular section and a plan view of a dFetail thereof on a larger scale than that in ig. 1. s

Referring to Fig. 1: 0 designates a fish 0 pond. The arriving sewage flows first through a settling basin a into a ditch b at one side of the fish pond, both ends of said ditch being in communication with the ends of the fish pond c. In said ditch an artificial at current of the pond water is. produced by means of a lifting pump f arranged in the ditch between the sewage supply to the latter and one end of the fish pond. For the urpose of obtaining, for instance, a triple 'lution of the sewage,the triple quantity of pond water is raised by the lifting pump, that is, the sewage receives in the ditch a my hand.-

1924. Serial No. 134,010.

triple .dilution by'pond water and arrives thus'at the pond itself in diluted condition.

A quantity of pond water corresponding to 5 the inflowing sewage escapes continuously through the overflow outlet 11.

Figs. 2 and 3 show a preferred constructional form of the lifting pump. For raising the water .compressed air is employed, so which is produced in the engine house 9 and su lied through a pipe h. 4

e compressed air produces in the upright pump shaft an ascending water motion and compels thereby the pond water to flow along in the ditch b and thus to circulate continuously in the fish pond. The compressed air has the further'advantage to supply to the pond water oxygen necessary for the life of the fishes. The pond surface 00 required for the treatment of a certain quantity of sewage can thus become smaller than under conventional circumstances.

By the improvedarrangement of the fish 0nd an equally complete sewage treatment I5 is obtained to that by trickling filters or by activated sludge treatment; said arrangement having furthermore the economical advantage over said latter methods that by the pisciculture revenues are gained.

What I claim, is v The combination, with a fish pond con- 'taining water, of a ditch at one side of the pond and at both ends in communication with the ends of the latter, a sewage supply to said ditch, an overflow outlet at one end of the pond, and means to create a .continuous circulation through said ditch of the pond water and a dilution by the latter of the incoming sewage before its admission to '9 the pond. V

In testimony whereof I have hereunto set KARL IMLHOFF. 

